Abstract: A microphone array comprises a circuit board, a first microphone, and a second microphone. The circuit board comprises a first layer, a third layer, and a second layer sandwiched between the first and third layers. The first layer comprises a first shielding part with a fixed electric potential. The third layer comprises a second shielding part with the fixed electric potential. The second layer comprises an electrically conductive part running between the first and second shielding parts. The first microphone is attached to the first layer of the circuit board. The second microphone is attached to the first layer of the circuit board and electrically connected to the first microphone through the electrically conductive part of the second layer of the circuit board.

Abstract: A portable information terminal having high adaptability and high convenience with respect to operating environment, and by which comfortable and high-quality sounds can be reproduced is provided. A sound reproducing system in a portable information terminal 1, wherein the portable information terminal is provided with at least two acoustic loudspeakers 2a and 2b; and the at least two acoustic loudspeakers are driven simultaneously to compensate their reproduced sounds with each other.

Abstract: A perforated plate includes a plurality of holes divided into a first set of holes and a second set of holes. Each hole in the second set of holes has an area smaller than that of each hole in the first set; and the holes of the first and second sets are arranged with respect to one another to form a graphic pattern.

Abstract: It provides a condenser microphone such as a tiepin type including a small microphone unit, which is capable of effectively suppressing noise generation due to an electromagnetic wave. It covers the entirety from a microphone unit 12 to a connecting cable 22 with an integrally formed cover member 32 and connects the cover member 32 to a shielded wire 25 so as to electromagnetically shield the entirety.

Abstract: A temperature control apparatus used with an audio amp to prevent the audio amp from overheating and noise from being generated by effectively controlling a cooling fan of the audio amp includes a power supply to supply an electrical power, a power amp to amplify an input audio signal using the electrical power supplied from the power supply, a signal detector to detect the amount of the current flowing from the power supply during a predetermined time, a temperature sensor to sense a temperature over a predetermined level generated from the power amp, and a micro controller to control a cooling fan according to the amount of current output from the signal detector and/or the temperature sensed by the temperature sensor.

Abstract: A capacitor microphone in which a microphone case is made of a conductive material, has a microphone case connector connecting a cable connector at one end of a microphone cable to an internal circuit of a microphone, and is in electrical connection with the cable connector, and in which a conductive and elastic plate-like member is provided at a bottom of the microphone case connector, and is wedged by the cable connector and the microphone case connector. The cable connector and the microphone case connector being electrically connected via the conductive and elastic plate-like member.

Abstract: There is provided a low-cost loudspeaker system which can adjust attenuation and provide protection against an excessive input. Between input terminals and a loudspeaker unit is provided a serial circuit including a plurality of resistor elements. A switch is provided which can switch between connected and disconnected states of two points, which includes one or more resistor elements of the serial circuit therebetween, through an over-current protection element.

Abstract: A portable electronic device may have acoustic ports such as microphone and speaker ports. Acoustic devices such as microphones and speakers may be associated with the acoustic ports. An acoustic port may have an opening between an interior and exterior of the portable electronic device. The opening may be covered by a metal mesh. An acoustic fabric may be interposed between the metal mesh and the opening. The opening may be formed from a hole in a glass member having outer and inner chamfers. A microphone boot may be provided that forms front and rear radial seals with a housing of the device and a microphone unit respectively. The microphone boot may also form multiple face seals with the microphone unit. A speaker for the speaker port may be enclosed in a sealed speaker enclosure. The speaker enclosure may have a pressure-equalizing vent slit covered with an acoustic mesh.

Abstract: A package of a surface-mountable electronic component to be reflow-soldered to a circuit board at about 250° C. or more includes a case and a cover. The cover has a softening temperature lower than the reflow temperature, and the case has a softening temperature higher than the reflow temperature. In the package, softening the cover compensates for the stress on the bonded surfaces resulting from a difference in thermal expansion between the case and the cover caused during reflow.

Abstract: To provide a wireless microphone device that enables a circuit board, which is to be provided with an oscillation circuit, to be decreased in size without deteriorating radiation characteristics. The wireless microphone device is configured to include: a circuit board 5 that is sectioned into circuit areas 11a and 11b and makes the respective circuit areas function as antenna elements of a dipole antenna; an oscillation circuit 21 that is arranged in the circuit area 11b and generates a high frequency signal on the basis of a voice signal from a microphone 2a; a feeding path for feeding the high frequency signal to an electrically conductive layer 11 in the circuit area 11b through a feeding point positioned on the circuit area 11a side distant from the oscillation circuit 21; and a high frequency shield covering at least a part of the feeding path.

Abstract: It is an object of the present invention to provide a vibrating plate of a dynamic microphone and a method of manufacturing the vibrating plate. The vibrating plate includes a center dome and a sub-dome which includes a damping thin film having stable quality. Referring to FIG.

Abstract: A net made of material containing at least metal is bonded to a protector of a loud speaker, and hence shields electromagnetic waves. Electromagnetic interference can be prevented in an electronic apparatus such as a portable phone employing the loud speaker.

Abstract: An arrangement used in a speaker designed to restrict movement of at least a portion of the speaker cone, to inhibit the speaker cone from deforming, completely flipping inside out and/or to inhibit sticking of the speaker cone to a frame of the speaker. In one arrangement, there is provided a speaker insert that is designed to be inserted at least partially between the frame and the cone of a speaker. The speaker insert includes a body having a front face and a rear face, a frame opening positioned at least closely adjacent to a center region of the body, and a plurality of gas openings spaced from the primary opening and spaced from a periphery edge of the body. In another and/or additional arrangement, the speaker includes a modified speaker frame.

Abstract: In a gooseneck condenser microphone in which a condenser microphone unit is supported via a support pipe including a flexible pipe, the shield in a flexible pipe part is enhanced. In the condenser microphone including the condenser microphone unit and an output module section provided with a circuit board for outputting audio signals in a shield case, the condenser microphone unit being supported on the output module section via the support pipe including the flexible pipe, and the condenser microphone unit being connected electrically to the circuit board via a microphone cable 40 having a shield covering line 43, which is inserted in the support pipe, at least in a part of the microphone cable 40, which part being installed in the flexible pipe 31, 32, the shield covering line 43 is exposed, and the part of the microphone cable 40, which part being installed in the flexible pipe 31, 32, is brought into contact with the flexible pipe 31, 32 at many points.

Abstract: A loudspeaker grille for a wall-mount loudspeaker in a home environment is disclosed, which comprises a frame attached directly to a wall where a loudspeaker being mounted, the loudspeaker enclosure lending no support to the frame, and a cover stretched across the frame, the cover being substantially transparent to acoustic energy, wherein the cover provides protection as well as decoration to the underneath loudspeaker.

Abstract: A pop reduction filter can be properly replaced with a simple operation according to the use of a microphone. A wind shield including a shield body 20 made of an open-cell foam with a microphone insertion hole 30, the wind shield being directly put on a microphone M through the microphone insertion hole 30, the wind shield including a disk-like pop filter 40 detachably housed in the microphone insertion hole 30 so as to be orthogonal to the 0-degree direction sound pickup axis of the microphone M, the pop filter 40 being made of an open-cell foam different in foam density from the open-cell foam of the shield body 20.

Abstract: In a condenser microphone unit connected to an output module section via a dedicated microphone cord, the generation of noise caused by strong electromagnetic waves sent from a cellular phone etc. is effectively prevented by a simple configuration. In the condenser microphone unit in which a microphone capsule 10 is supported, for example, exchangeably on a support enclosure 20 and a microphone cord 30 consisting of a two-core shield covering line for connecting the condenser microphone unit to the output module section is pulled into the support enclosure 20, a shield covering line exposure portion 33a, in which a shield covering line 33 is stripped off, is provided in a portion in which the microphone cord 30 is pulled into the support enclosure 20, and a fixing member 40 formed into a doughnut shape is fixed to the shield covering line exposure portion 33a by staking, by which the shield covering line 33 is connected to the support enclosure 20 via the fixing member 40.

Abstract: A submersible loudspeaker assembly is provided. The loudspeaker assembly includes: a housing; a loudspeaker enclosed within the housing; an external diaphragm disposed adjacent to the loudspeaker. The external diaphragm is acoustically transparent when subject to ambient air pressure, but configured to flex towards the loudspeaker when submerged in water.

Abstract: A loudspeaker unit (2) of a loudspeaker system (1) is fitted to a cabinet (4). An absorbent (3) is disposed in a hollow chamber (R) inside the cabinet (4) and absorbs a gas inside the hollow chamber (R). A phase inverting mechanism (8) inverts the phase by resonating with a sound of a specific frequency radiated from the loudspeaker unit (2) into the hollow chamber (R) and radiates this sound to outside. The watertight means of the phase inverting mechanism (8) prevents invasion of moisture into inside the hollow chamber (R) from outside the cabinet (4) through the phase inverting mechanism (8).

Abstract: A multifunction speaker has a frame made of an insulation material and having a cylindrical portion, a pair of supporting springs secured to the frame and to a magnetic circuit for supporting the magnetic circuit. The magnetic circuit comprises a pole piece having a center pole and a flange on which an annular magnet is mounted. The flange of the pole piece has a pair of positioning projections projected from a periphery of the flange for positioning the magnet.

Abstract: In a gooseneck condenser microphone, the generation of noise caused by strong electromagnetic waves sent from a cellular phone etc. is prevented by adding a simple element.

Abstract: A speaker cone assembly (200) used in an electronic device includes a speaker basket frame (201) and a cone (203) for covering a top surface of the speaker basket (201). The cone (203) includes a downward facing lip (216) for radially sealing the perimeter edge (207) of the cone (203) with the housing (235). A flexible circular insert (225) extends around the perimeter edge (207) for reducing the amount of moisture contacting the downward facing lip (216). The speaker basket (207) includes a mounting channel (218) where the circular seal (225) includes a radial channel (233) that engages with the mounting channel (218) for preventing moisture from propagating under the speaker basket frame (201).

Abstract: A microphone shield system captures sound in adverse conditions. The system includes a microphone positioned within an enclosure. A membrane stretched across a portion of the enclosure passes signals within a selected frequency range. The membrane may block or attenuate signals above and/or below the frequency range to pass a desired sound with little surrounding interference.

Abstract: A mobile wireless communications device includes a housing and circuit board in the housing and having radio frequency (RF) circuitry and a power amplifier and microphone mounted thereon. An antenna is carried within the housing and operative with the RF circuitry. An RF shield surrounds and isolates the microphone from the RF circuitry, power amplifier and antenna and shields the microphone from radiated energy generated from the RF circuitry, antenna or power amplifier.

Abstract: A hearing enhancement system that enhances a user's hearing based on a directional speaker is disclosed. In one embodiment, the system can include an interface unit that has a directional speaker and a microphone. The microphone captures input audio signals that are transformed into ultrasonic signals. The speaker transmits the ultrasonic signals, which are transformed into output audio signals by interaction with air. At least a portion of the output audio signals are modified to enhance the hearing of the user. Based on the system, the user's ear remains free from any inserted objects and thus is free from annoying occlusion effects. Compared to existing hearing aids, the system is relatively inexpensive. In another embodiment, the system can also be used as a phone. In yet another embodiment, the system can also access audio signals from other portable or non-portable instruments, wired or wirelessly, such as from home entertainment units, phones, microphones at a conference or speakers at a movie theater.

Abstract: A multifunction speaker comprises a frame made of an insulation material and having a terminal supporting portion, a pair of supporting springs are partly embedded in the frame. A magnetic circuit is resiliently supported in the frame by the springs, a diaphragm is secured to the frame, a coil is secured to the diaphragm, an upper metal protector and a lower metal protector are set on the frame. The upper and lower protectors are secured to each other so as to shield the frame except the terminal supporting portion of the frame, a pair of terminals are provided on the terminal supporting portion, each of the terminals is connected to an end of the coil, and a ground terminal is provided on the terminal supporting portion and is connected to either of the upper and lower protectors.

Abstract: Audio systems are housed by an enclosure with a substantially waterproof seal such that the audio systems may be mounted in outdoor locations such as decks, boat docks, and the like. The enclosure may include a panel that opens relative to a tub portion, such as by a hinged connection, and a substantially waterproof seal located there between. The audio systems may include one or more various features such as external speaker connections so that speakers may be located distantly from the enclosure. Other features may include internal amplification that may be stand-alone or integrated into an audio signal source such as a radio or compact disc player or combinational device such as an automobile head unit. Additional features may include a power supply that provides power for the amplification and/or audio source, an external cover with a substantially waterproof seal relative to the enclosure, filtered ventilation via an electric fan, and other related features.

Abstract: The present invention relates to an electromagnetically-countered system including at least one wave source irradiating harmful electromagnetic waves and at least one counter unit emitting counter electromagnetic waves for countering the harmful waves by such counter waves. More particularly, the present invention relates to generic counter units of electromagnetically-countered systems and to various mechanisms for countering the harmful waves by the counter units such as, e.g., by matching configurations of the counter units with those of the wave sources, matching shapes of such counter waves with shapes of the harmful waves, and the like. The present invention also relates to various methods of countering the harmful waves with the counter waves by such source matching or wave matching and various methods of providing the counter units as well as counter waves. The present invention further relates to various processes for providing such systems, such counter units thereof, and the like.

Abstract: A hybrid circuit (300) for use in a miniature microphone assembly (100) reduces power supply noise on the audio signal input (214) of an impedance buffer amplifier (200) using one or both of shielding conductors 422, 424 to reduce parasitic capacitance between signal (418) and power supply (420) conductors. A ground plane (424), an interposing conductor (422) and combinations thereof are selectively placed and coupled to either ground (232) or a low impedance signal node (216) to reduce or eliminate the undesirable parasitic capacitance.

Abstract: A speaker device for a portable terminal including a first housing and a second housing coupled to the first housing and rotating towards or away from the first housing while facing the first housing. The speaker device includes a speaker unit mounted in the second housing, first sound output holes formed in the second housing, and second sound output holes formed in the first housing. When the second housing is folded to the first housing, a sound output from the speaker unit is guided into the first housing through the first sound output holes, travels inside the first housing and is output through the second sound output holes. In the speaker device for the portable terminal, the speaker unit and the resonating space are separately positioned in the housings, thereby providing a mellow volume and a high-quality sound and contributing to slimness of the portable terminal.

Abstract: A fused speaker terminal cup for component attachment to a speaker enclosure and electrical connection to a speaker system is disclosed. In particular, the present invention provides a novel speaker terminal cup design in which a removable fuse is externally mounted therein for external access. In a preferred embodiment, the fuse receptacle is removable from the terminal cup to permit interchangeable fuse type selection.

Abstract: A wide dispersion speaker system 1 comprises a cone type speaker unit 2, and a restricting element 10A. The restricting element 10A is provided with a center hole 11 at a center section thereof, and a peripheral hole 12 located outward relative to the center hole 11. The restricting element 10A has an annular sound travel inhibiting portion 19 positioned radially outward relative to the center hole 11 and radially inward relative to the peripheral hole 12. An outer end in a radial direction of the sound travel inhibiting portion 19 is positioned at a substantially middle point between an outer end in the radial direction of the center hole 11 and an outer end in the radial direction of the peripheral hole 12 or positioned radially outward relative to the substantially middle point.

Abstract: An improved method and device for controlling cone breakup (divisional modes) in extended range, cone diaphragm type electromechanical acoustical transducers for reproducing an acoustical signal from a corresponding electrical signal is provided. The transducer assembly includes a low mass cone shaped diaphragm, a voice coil former of 30 mm or less in diameter, and a shaped device no wider than the diameter of the voice coil former and extending into the inner volume of the cone but no taller than the height of the outside edge of the cone. This shaped device defines the shape and volume of a small mass of air within the boundary layer of air where molecular adhesion of air molecules to the cone diaphragm surface becomes a significant variable in the performance of the extended range transducer.

Abstract: A speaker has a case having a peripheral projection, a magnetic device having a yoke, and a permanent magnet and secured to the case. A diaphragm is secured to the case at the peripheral projection. A protector has an upper plate and a cylindrical holding portion at the periphery of the upper plate. The protector is secured to the case at the cylindrical holding portion.

Abstract: An antenna coil is present in a hearing aid device to wirelessly transmit signals between a hearing aid device and a further device. Due to the required miniaturization of hearing aid devices, only minimal space is available for the arrangement of the antenna coil in the hearing aid device. The invention therefore provides for winding the antenna coil around or on an existing electro-acoustic transducer in the hearing aid device or around a capsule surrounding the transducer. A comparatively large antenna coil, for which little additional space is required, can thereby be provided in the hearing aid device.

Abstract: A system (400) for reducing non-acoustic noise includes a primary sensor (420), at least one secondary sensor (410), a filter (415), and a summation unit (425). The primary sensor (420) measures pressure and produces a primary pressure signal. The at least one secondary sensor (410) measures pressure and produce a secondary pressure signal. The filter (415) processes the secondary pressure signal to produce a filtered pressure signal. The summation unit (425) subtracts the filtered pressure signal from the primary pressure signal to reduce non-acoustic noise in the primary pressure signal.

Abstract: An assembly (100) for acoustic sealing of a transducer (104) in a communication device is provided. The assembly (100) allows for assembly along one axis (112) and acoustical sealing along another axis (115). The assembly (100) allows for another transducer (106) to be acoustically sealed on a different plane than that of the first transducer (104). Through the use of a compliant member (204) and rigid member (108) coupled to the transducer (104) a floating seal is formed between the chassis (102) and the housing (103) of the communication device (100).

Abstract: A portable radio apparatus has a radio circuit (9) provided on a printed circuit board (5), a speaker (8) provided on a rear cover (2), and a shield case (10) provided to cover the radio circuit (9). In the shield case (10), ventilation holes (10A) having a size that does not affect the shielding performance are provided in close proximity of the rear of the speaker (8).

Abstract: A meter apparatus for a vehicle, includes a circuit board, a sound generating element mounted on one face of the circuit board, a back cover covering the face of the circuit board on which the sound-generating element is mounted, and a separate sound-generating element cap attached to the back cover and covering the sound-generating element in the state that the circuit board is covered with the back cover, the sound-generating element cap being adapted to adjust a sound pressure level of the sound-generating element.

Abstract: A speaker apparatus can ensure a large size and area of a diaphragm so as to improve reproducing capability in a low sound range and increase an output sound pressure, and can constitute a plurality of vibrating points (signal control points). An input signal Vin having a plurality of independent channels is inputted, then the signal input Vin is processed in a sound signal processing portion by calculating and adding of an interference canceling signal between the signal control points, by calculating and adding of a sound interference signal for causing the interference between outputs from the signal control points in an arbitrary point, etc., so as to be inputted to transducers that are attached to a single diaphragm. The transducer transduces an electric signal into mechanical vibration. A plurality of the signal control points are generated on the single diaphragm, and each signal control point cause the single diaphragm to vibrate.

Abstract: An edge damper frame 18b is disposed in between a part of an outer peripheral surface 20a of a frame-cover 20 and a leveling surface 14c-1 of a frame 14. A slope 18e of a diaphragm 15 is extended from the edge damper frame 18b toward the frame 14 and provided alongside an outer side surface 14c-2 of a convex portion 14c of the frame 14.

Abstract: A self-diagnostic circuit for speaker systems that allows a speaker system to generate its own test signals, e.g., tones, appropriate for the transducer(s) in the speaker system. The test signals are routed to the analog circuits in the speaker system. The test signals are also routed to the transducers, so that an operator can evaluate speaker output tones. In one embodiment, the test signals are also routed to an analog activity sensor that senses activity in the speaker analog circuit paths and sends a status indicator to be displayed to the operator. In a first embodiment, the self-diagnostic circuit is a part of a stand-alone speaker system, such as a home theater sound system. In a second embodiment, the self-diagnostic circuit is included in a speaker system that is included in a computer system.

Abstract: A speaker grille (10) comprises a cloth (18) and a frame (20) to support the cloth (18). The cloth (18) is preferably stretched taunt over the frame (20) for minimal movement in response to speaker excursion. The frame (20) includes a plurality of sidewalls (29) defining a plurality of slots (30) through which sound waves may travel between a smooth surface (26) supporting the cloth (18) and a mounting surface (28) with which the frame (12) mounts to a speaker box (12). The slots (30) preferably penetrate all four sides of the frame (20) and may also penetrate all four corners of the frame (20). The slots (30) form channels that act as waveguides and allow sound waves to travel from speakers (16) through the frame (20). The frame (20) and the channels may be configured to direct the sound waves at various angles to the speaker box (12).

Abstract: The invention is an modified audible signal, such as a piezoelectric noise-making and audible signaling device, which further includes a hydrophobic covering material, such as polytetrafluoroethylene (PTFE). The hydrophobic covering material is known to be water resistant, but does not effect the sound of the audible signaling device, thereby delaying or preventing the failure of the audible signaling device from water corrosion.

Abstract: A speaker mounting structure is provided in which a speaker frame (11) is fixed to a mounting panel (P) by engaging latching hooks (24L, 24R) and a latching clip (26) provided on the speaker frame (11) with mounting holes (22, 23L, 23R) formed in the inner panel (P) of an automobile door. The latching hooks (24L, 24R) and the latching clip (26) are disposed inside the outer peripheral edges of annular seal members (16, 17) that are bonded to a mounting surface (11a) of the speaker frame (11) and are in intimate contact with the inner panel (P). As a result, even when water infiltrates to the speaker (C) side from an opening (21) or the mounting holes (22, 23L, 23R) of the inner panel (P), the seal members (16, 17) can block the water and prevent it from flowing to the passenger compartment side. It is thereby possible to reliably avoid ingress of water.

Abstract: A loudspeaker assembly includes a speaker diaphragm that is displaced to produce sound, and a spinner element mounted to rotate in the path of sound waves produced by the speaker diaphragm, the spinner defining sound wave passing through openings, in said path. Illumination of interior structure, may be provided, for visual effect through openings defined between rotating spinner arms, and between non-rotating grille arms. Different combinations of grilles and spinners are easily enabled by mounting structure.

Abstract: A sound collecting device is provided which is designed to minimize adverse effects on an output caused by exposure of an electroacoustic transducer to the air. The device includes an electroacoustic transducer and a vibrating circuit. The transducer is exposed to the air and responsive to input of a sound wave to produce a corresponding acoustic signal. The vibrating circuit vibrates the transducer to shake foreign substances such as dust or drops of water from the transducer. In a modified form, an electromagnetic sensor is provided which measures an electromagnetic noise transmitted to the transducer and which removes the electromagnetic noise from an output of the transducer to produce a noiseless acoustic signal.

Abstract: The invention relates to an acoustic structure which complies with protection standard IP 67 and which can be used to provide hands-free capability e.g. in cellular terminals or small radio receivers. The acoustic structure comprises, in a device body (100), two interconnected, separate cavities for speaker means (151, 152, 153) and isolating means (120, 125, 130, 140). An isolating diaphragm (125) belonging to the speaker arrangement according to the invention is utilized simultaneously as an isolating means against dust and water and as a sound-reproduction element.

Abstract: A light weight fully assembled speaker enclosure is provided that includes a backbox having a peripheral edge; a grill that is crimped around the peripheral edge of the backbox, and a sound-baffle sheet disposed between the backbox and the grill, the sound-baffle sheet having an opening for placement of a speaker. Also provided is a speaker system having an audio speaker; a backbox having a peripheral edge; a grill that is crimped around the peripheral edge of the backbox and that is affixed to the speaker; and a sound-baffle sheet disposed between the backbox and the grill, the sound-baffle sheet having an opening for placement of the speaker.

Abstract: A protective acoustic cover assembly including a metal foil with perforations, and a treatment on one or more surfaces of said metal foil. The treatment is a hydrophobic or oleophobic treatment, or both. The protective acoustic cover assembly has an average specific acoustic resistance of less than about 11 Rayls MKS from 250-300 Hz, an average specific acoustic reactance magnitude of less than about 1 Rayls MKS from 250-300 Hz, and an instantaneous water entry pressure value of greater than about 11 cm. The perforations of the metal foil preferably have an average maximum pore size of less than about 150 micrometers. The protective acoustic cover assembly further includes an adhesive mounting system, and the preferred metal foil is nickel.